Comment by Mike Gann:
I've edited the date, Han. Thank you.
Comment by han enderman:
RZ MR-3795 - Date 1942 here (and on some neighbouring numbers in the MR series) is very wrong. A-side was recorded 3-3-1947, Victor mx D7VB-476; B-side 4 Sep 46, mx D6VB-2135. Release date of Vic 20-2236 (linked) is given here as Apr 1947 (and as May 1947 on
discogs). Date indications are: MR-3766 is by a Dance Band Championship 1945 prize winner, and MR 3785 by a 1946 prize winner. Date of MR-3779 is given as Oct 1946. - Actually I was looking for the last issue with the MR prefix (with serifed font) followed by a space and with a 2-line legend above the label name (present on MR 3789), and for the first issue with the MR prefix (in sans serif font) followed by a dot and with a 4-line legend above the label name (present on MR.3807). And then it appeared that in the range MR.3791-3795 the sans serif prefix is followed by a dot, but there is still a 2-line patent legend.